/Engine/Source/Runtime/RHI/Public/PipelineStateCache.h
Retrieves RTPSO object from cache or adds a task to create it, which will be waited on by RHI thread. May return NULL in non-blocking mode if pipeline is not already in cache.
namespace PipelineStateCache { FRayTracingPipelineState * PipelineStateCache::GetAndOrCreateRayTracingPipelineState ( [FRHICommandList](API\Runtime\RHI\FRHICommandList) & RHICmdList, const [FRayTracingPipelineStateInitializer](API\Runtime\RHI\FRayTracingPipelineStateInitiali-) & Initializer, ERayTracingPipelineCacheFlags Flags ) }